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Jan 23rd, 2013
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 Anyone use their cranking battery for 3rd TM battery?
#7022020
01/07/12 07:35 PM
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Joined: Jul 2007
Posts: 1,402
Skeeterbrain
OP
Extreme Angler
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OP
Extreme Angler
Joined: Jul 2007
Posts: 1,402 |
Anyone use their cranking battery for the 3rd trolling motor battery when the changed from 24V to 36V because they did not have room for a 4th battery.?
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: Skeeterbrain]
#7022083
01/07/12 08:13 PM
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Joined: Apr 2010
Posts: 24,720
patriot07
TFF Guru
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TFF Guru
Joined: Apr 2010
Posts: 24,720 |
Wouldn't you risk running your cranking battery down to the point that you wouldn't be able to get your big motor started at the end of the day?
Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: patriot07]
#7022147
01/07/12 08:49 PM
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Joined: Aug 2011
Posts: 2,957
Bob Landry
Extreme Angler
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Extreme Angler
Joined: Aug 2011
Posts: 2,957 |
Wouldn't you risk running your cranking battery down to the point that you wouldn't be able to get your big motor started at the end of the day? Agreed. You can live without a TM, stereo, even running lights if you have to, but you have to be able to start the motor everytime.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2020 Robalo R200 CC, Yamaha 150
Bitter Gun Owner
Bitter Clinger
Armed Infidel
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: Skeeterbrain]
#7022373
01/07/12 10:10 PM
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Joined: Dec 2008
Posts: 15,112
grout-scout
TFF Guru
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TFF Guru
Joined: Dec 2008
Posts: 15,112 |
Sounds like the better option is to just stick with a 24v motor? Besides cranking batteries are usually a different style than the trolling motor batteries are.
Last edited by grout-scout; 01/07/12 10:11 PM.
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: Skeeterbrain]
#7022422
01/07/12 10:21 PM
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Joined: Sep 2006
Posts: 2,975
Doug Vahrenberg
Extreme Angler
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Extreme Angler
Joined: Sep 2006
Posts: 2,975 |
Besides risking not being able to start the motor your electronics would be alot more susceptible to RF Noise from the Trolling motor being hooked to the same batteries that power them
 Website: www.dougvahrenberg.comSponsored by: Skeeter, Yamaha, MinnKota, Humminbird, LakeMaster, Transducer Shield & Saver, LuckyCraft, Dobyns Rods, Daiwa, Dave's Custom Baits, Omega Custom Tackle, Browning Eyewear, Elite Tungsten Co., Angler Innovations, Massey Ferguson.
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: Skeeterbrain]
#7022894
01/08/12 12:38 AM
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Joined: Dec 2006
Posts: 3,287
Dayne
TFF Team Angler
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TFF Team Angler
Joined: Dec 2006
Posts: 3,287 |
One of my friends does all the time and has for many years. He has a 200 Merc and hb electronics. He has never had a problem that I have heard about.
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: Skeeterbrain]
#7024495
01/08/12 03:20 PM
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Joined: Nov 2007
Posts: 5,306
ssmith
TFF Celebrity
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TFF Celebrity
Joined: Nov 2007
Posts: 5,306 |
that is a bad idea if you have some type of short it could damage electrical parts on your motor an if the trolling motor pulls it down it wont have the power it needs in the cranking of the motor good luck.
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: ssmith]
#7024523
01/08/12 03:27 PM
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Joined: Dec 2006
Posts: 3,287
Dayne
TFF Team Angler
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TFF Team Angler
Joined: Dec 2006
Posts: 3,287 |
that is a bad idea if you have some type of short it could damage electrical parts on your motor an if the trolling motor pulls it down it wont have the power it needs in the cranking of the motor good luck. That may be so but he has been doing it and fishing tournaments for over 10 years on this rig.
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Re: Anyone use their cranking battery for 3rd TM battery?
[Re: Skeeterbrain]
#7025052
01/08/12 05:57 PM
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Joined: Oct 2005
Posts: 1,711
Lou r Pitcher
Extreme Angler
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Extreme Angler
Joined: Oct 2005
Posts: 1,711 |
Yes. It will work but with consequences....
1) You may not be able to hook up and use the trolling motor's internal universal sonar.
2) You will need to get/check hourly a battery monitoring voltage gauge to ensure you do not discharge the cranking battery below 50% state of charge. (this is good practice in any battery setup)
3) True 'cranking batteries' will give you poor performance on a slow discharge like a TM.... so you will have to purchase a compromise "dual purpose" battery giving up some cranking amps to get some reserve minutes.
4) You will have little emergency cranking battery power late in the day if your motor suddenly gets hard to start. Better not use this setup for off-shore or lonely isolated lakes with no cellphone access.
(an electrical short is going to trip a breaker or blow a fuse, so there is not really an additional risk in this setup for damaging your motor.)
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